Debug Resets

The CoreSight™ debug functionality is spread across all the power domains. The PLM is aware of the states of the power domains and is responsible for the appropriate distribution of the debug reset.

The debug reset is passed to all CoreSight components within the PMC, LPD, FPD, and CPM through PMC reset register bits. The debug port controller (DPC) is reset by a register in the TAP controller, which is accessed through the PMC interconnect.

At the device level, this reset also applies to the high-speed debug port (HSDP) through the RST_DBG_LPD [RST_HSDP] bit. If the soft Aurora is implemented in the PL, a PMC GPO bit can be used to reset the logic. The PL debug components are separated from mission IPs and are placed on a separate reset. The DDR memory controller, NoC interconnect, and AI Engine resets are controlled through four NPI controls, which allows the partitioning of the resources into groups and associates each group with a specific reset category.

The debug logic includes the DPC in the PMC and the CoreSight logic that extends into the PMC, PS, PL, and other parts of the device. The debug resets are summarized in the following table.